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Compass: Difference between revisions
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== External links == | == External links == | ||
* [http://geomag.usgs.gov USGS Geomagnetism Program] | * [http://geomag.usgs.gov USGS Geomagnetism Program] | ||
* Science Friday, "''[http://www.sciencefriday.com/pages/2002/May/hour2_053102.html The Riddle of the Compass]''" (interview with Amir Aczel, first broadcast on [[NPR]] on [[May 31]], [[2002]]). | * Science Friday, "''[http://www.sciencefriday.com/pages/2002/May/hour2_053102.html The Riddle of the Compass]''" (interview with Amir Aczel, first broadcast on [[NPR]] on [[May 31]], [[2002]]). | ||
